The **CSHB0412-R68M** is a high-current, shielded surface-mount (SMD) power inductor. It is commonly used in DC-DC converters, voltage regulator modules (VRMs), and high-frequency power supplies. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the physical and electrical characteristics: | Code Segment | Meaning | Specification | | :--- | :--- | :--- | | **CSHB** | Series Code | High-current, shielded power inductor series | | **0412** | Dimensions | Approx. 4.0 x 4.0 mm footprint, 1.2 mm height | | **R68** | Inductance Value | **0.68 µH** (R denotes decimal point) | | **M** | Tolerance | **±20%** | --- ### 2. Key Electrical Specifications While specific values can vary slightly by manufacturer (such as Chilisin or Cyntec), typical parameters for an R68M in this size are: * **Inductance:** 0.68 µH. * **DC Resistance (DCR):** Low resistance (typically 10–20 mΩ range) to minimize power loss. * **Saturation Current (Isat):** The current level where inductance drops by a specific percentage (usually 30%). For this size, it is often between **7A and 10A**. * **Heating Current (Irms):** The current that causes a 40°C temperature rise. Usually closely matched to the Isat. --- ### 3. Physical & Material Features * **Shielding:** It is a **magnetically shielded** component. This prevents electromagnetic interference (EMI) from affecting nearby sensitive components on the PCB. * **Core Material:** Usually made of a metal alloy powder core. This provides high saturation flux density and stability across a wide temperature range. * **Construction:** Molded construction which offers superior mechanical strength and resistance to acoustic noise (buzzing). --- ### 4. Common Applications Due to its low profile (1.2mm) and high current handling, it is found in: 1. **Smartphones & Tablets:** Power management for processors. 2. **Laptops/PCs:** Localized power conversion (Point of Load). 3. **Graphics Cards:** High-speed switching VRMs. 4. **SSD Drives:** Compact power filtering. --- ### 5. Schematic Symbol & Footprint ```text Inductor Symbol (L1) ----(UUUU)---- | | Pin 1 Pin 2 ``` * **Footprint:** SMD (Surface Mount Device). * **Polarity:** Inductors are non-polarized, but the marking dot usually indicates the start of the winding for phase-sensitive circuits.